The torque indicates how strong a force must be to cause a body to rotate or change its speed. It is an important factor for machines, especially speed-controlled fans and pumps. The use of a frequency inverter makes sense at this point because it can still provide the full torque at a speed of 0. Torque monitoring is crucial to ensure that a machine operates within its permissible operating range and to prevent premature failure or damage. A common method for monitoring the torque is the use of load envelope curves. Load envelope curves are diagrams that show the torque and speed of a machine over a certain period of time. They show the loads acting on a machine and how they react to the rotary movement. The load envelopes are normally recorded during the operation of a machine and can be used to evaluate and compare the performance, efficiency and integrity of a machine.

Monitoring the load envelope curve helps with this:

Torque monitoring helps to reduce the energy consumption of systems and make operation safer and more efficient. If a malfunction is detected early, the service life of machines can also be extended. If, for example, the load status of a machine changes, the torque can be an indication of an overload. If this is corrected at an early stage, damage to the machine can be avoided.